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BUTTON

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Check the status of a controller button. --- * Check Button Check a specific button if it has been held, repeated, pressed, or released. ** Syntax ```sb4 state% = BUTTON(controller%, button% {, mode% }) BUTTON controller%, button% {, mode%} OUT state% ``` |* Input | Description | |`controller%`|ID of the controller to check; 0 to 4.\ Controller 0 is a combination of all connected controllers. | |`button%`|ID of the button to check; see *Button IDs* table. | |`mode%`|Button test mode (optional): {|* Number | Description | |0|Button is held (default) | |1|Button was just pressed or triggered by repeat | |2|Button was just pressed | |3|Button was just released |}| |* Output | Description | |`state%`|True if the button is in the checked state, false otherwise.| ** Examples ```sb4 'turn the background red if the A button is held down LOOP VSYNC IF BUTTON(0,#B_A) THEN BACKCOLOR #C_RED ELSE BACKCOLOR #C_CLEAR ENDIF ENDLOOP ``` --- * Button Bitset (SB3 Mode) Return the state of all buttons as a bitset. This form is similar to SmileBASIC 3's `BUTTON` function. ** Syntax ```sb4 state% = BUTTON(controller%) state% = BUTTON(controller%, -1, {, mode% }) BUTTON controller% OUT state% BUTTON controller%, -1 {, mode%} OUT state% ``` |* Input | Description | |`controller%`|ID of the controller to check; 0 to 4.\ Controller 0 is a combination of all connected controllers. | |`-1`|Pass -1 as the button ID to use this mode (optional) | |`mode%`|Button test mode (optional): {|* Number | Description | |0|Button is held (default) | |1|Button was just pressed or triggered by repeat | |2|Button was just pressed | |3|Button was just released |}| |* Output | Description | |`state%`|Bitset of all buttons. Corresponding bit is set if state check is true, clear otherwise.| ** Examples This function is used to return all of the button states simultaneously, for compatibility with previous SmileBASIC versions. However, the button ID constants are *not* compatible, so they must be used with a left-shift. ```sb4 'turn the background red if the A button is held down LOOP VSYNC IF BUTTON(0) AND 1<<#B_A THEN BACKCOLOR #C_RED ELSE BACKCOLOR #C_CLEAR ENDIF ENDLOOP ``` --- * Button IDs This table contains the button IDs and their constants. |* Name | Value | Description | | `#B_RUP`, `#B_X` | 0 | Top face button / X | | `#B_RDOWN`, `#B_B` | 1 | Bottom face button / B | | `#B_RLEFT`, `#B_Y` | 2 | Left face button / Y | | `#B_RRIGHT`, `#B_A` | 3 | Right face button / A | | `#B_LUP` | 4 | D-Pad up | | `#B_LDOWN` | 5 | D-Pad down | | `#B_LLEFT` | 6 | D-Pad left | | `#B_LRIGHT` | 7 | D-Pad right | | `#B_L1`, `#B_SL` | 8 | L trigger / SL trigger | | `#B_R1`, `#B_SR` | 9 | R trigger / SR trigger | | `#B_L2`, `#B_S1` | 10 | ZL trigger / Joy-Con side trigger | | `#B_R2`, `#B_S2` | 11 | ZR trigger / Joy-Con side Z trigger | | `#B_LSTICK` | 12 | Left stick click | | `#B_RSTICK` | 13 | Right stick click | | `#B_RANY` | 14 | Any right side button | | `#B_LANY` | 15 | Any left side button | | `#B_ANY` | 16 | Any button | * See Also - CONTROLLER - BREPEAT - XCTRLSTYLE

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